Knoxville Weather Forecast

    • 67
    • 78

    Chance Thunderstorms

    • 66
    • 82

    Chance Rain Showers

    • 68
    • 83

    Chance Thunderstorms

    • 66
    • 86

    Rain Showers Likely

    • 62
    • 77

    Chance Thunderstorms

    • 59
    • 74

    Chance Rain Showers

Today 16 Sep Knox

Mostly cloudy with scattered Showers. Cooler with Highs in the upper 70s. East Winds around 5 Mph. Chance of rain 30 percent.

Tonight 16 Sep Knox

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers and Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall after midnight. Lows in the upper 60s. East Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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Knoxville Temperature Statistics

September Temperature

Galesburg Municipal Airport (7.5 miles)

  • Lowest 14 September, 2026

    52.3 °F

  • Average September

    73.9 °F

  • Highest 3 September, 2026

    93.6 °F

Climate (2021–2026)

Galesburg Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    52.2 °F

  • Average High 2021–2026

    62.5 °F
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